Liquid heater



Patented Apr. 18, 1933 UNITED STATES PATENT OFFICE LIQUID HEATER.

Application filed September 17, 1980, Serial No. 482,608, and in Switzerland Inn 18, 1980.

This invention relates to improvements in liquid heaters and has for its object to provide an apparatus which is slmple'in construction and e'tlicient in operation.

Difficulty has been occasioned in liquid heaters due to the use of small diametered water conducting pipes leading from the heating means becoming clogged thereby interfering with the roper flow of water and it is one of the objects of this invention to overcome this inconvenience by the use of a removable plughaving a small aperture in conjunction with a water conducting plpe of a considerably larger cross sectional area.

In order that the invention may be fully understood and readily carried out, one form of the improvement'of the liquid heater according to the invention is described hereinafter, by way of example, and illustrated in the accompanying drawing.

In this drawing:

Figure 1 is an elevational view taken on an axial section.

Figure 2 is an axial section, of the plug regulating the circulation of the water and Figure 3 is a plan view of the'plug shown in Figure 2.

The warm water receiver 1 comprises, a dome-like heat transmitting member 2 over which is mounted in closely spaced relation a bell 3. A tube 4 rises from the bell and this tube and the upper part of the said bell are fitted with an insulation tube 4:. It is not necessary to insulate the interior part of the bell since the hot water, contained in the space comprised between the member 2 and the bell 3 is replaced, as evacuation proceeds through tube 4, by cold water from the receiver 1. The water at the lower part of the receiver, outside the aforesaid space, has not thus time to become warm.

A plug 5 regulates the circulation of the water and is jointed to the upper part of tube 4. This plug 5 is provided with a hole 6 for the passage of warm water, and is removable and can be raised in order to facilitate the removal of sediment from it, by means of an appropriate type of key, without entirely dismantling the apparatus.

Withdrawal of the warm water takes place through a pipe 7 fixed to the upper part of the receiver. As will be noted the plug 5 includes an annular attaching portion 8 which depends from the disc-like body 9. This attaching portion is arranged within the upper end of the tube 4 the disc-like body 9 being positioned on the upper edge of the said tube 4 while the outer edge is arranged in closely spaced relation with the inner surface of the pipe 7. An ear 10 is integral with the upper surface of the disc-like body 9- and is provided with a lateral opening 11 which communicates with the top of the calibrated hole 6.

The purpose of the plug is to ensure of the direct passage of heated water which rises through the tubes 4 and4' into the outlet pipe 7. In this connection the latter pipe is provided with an opening 12 so that in the event all of the water is not being withdrawn it can pass directly into the top of the receiver 1. The special key referred to is adapt ed to be engaged in the opening 11 in the ear to facilitate the removal of the plug when it is desired to remove sediment therefrom.

A combustion channel is provided at the bottom of the receiver beneath the heat transmitting member 2 and includes a tube 13 which is supported on the secondary bottom 14. This tube is spaced from the undersurface of the member 2 and the products of combustion after rising through the tube pass downwardly and through an opening 15 and thence through a flue 16 mounted in the side wall of the receiver.

Cold water is of course supplied to the receiver through the inlet pipe 17.

It is believed in view of the foregoing description that a further detailed description of the operation of the invention is entirely unnecessary. Likewise it is believed that the advantages of the invention will be readily apparent.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is:

1. A liquid heater comprising a water receiver including a dome-like heat transmitting member at the bottom thereof with a bell arranged in closely spaced concentric relation to said member, a tube rising from the bell, an insulation tube surrounding the top of the bell and the tube, an outlet pipe 5 in the top of the receiver havin its lower end arranged about the upper en of the insulated tube and provided with a lateral opening communicating with the receiver, a plug removably fitted in the top of the tube and 19 having a part positioned in closely spaced relation to the inner surface of the outlet pipe and provided with an opening for permitting a predetermined amount of heated water to pass directly from the insulation tube into the outlet pi e.

2. A liqui heater as claimed in claim 1, wherein the plug includes a disc-like body in which the hole is provided, an attaching portion depending from the body for remov- 20 able engagement with the tube, and an ear rising from the upper surface of the disclike body provided with a lateral opening communicating with the hole in the body and serving also as a means for facilitating the 225 removal of the plug.

3. In a liquid heater, the combination of heating means, a water heating and conducting pipe leading from the heating means, an accessible water conducting pipe in communication with the first pipe, and a plug having a relatively small aperture as compared with they diameters of the water conducting pipes removably seated on the first pipe at its point. of communication with the second pipe. and said plug being removable through said second pipe for cleaning purposes.

In testimony whereof we afiix our signatures.

MAROEL MUTRUX.

ROBERT OAILLET. 

